The Qiongdongnan Basin is an important gas hydrate exploration area in the South China Sea, but accumulation process poorly understood. By selecting Lingshui (LS) target and using first-hand geochemical data, three-dimensional seismic independent thermal insulation pressure maintaining shipborne core analysis system, this study, comprehensive geological evaluation was carefully conducted around...

We studied the behavior and residual structural capacity of reinforced concrete chimneys subjected to an uncontrolled fire. We used a combination of a heat transfer finite element model – to obtain the temporal distributions of temperature during the fire event – and the structural model of concrete chimney design provided by the American Concrete Institute (ACI 307–08). This approach allows es...

In environments isolated from solar radiation, diverse microbial populations and ecosystems are sustained by the chemical energy supplied from Earth!s interior. The most outstanding example is a deep-sea hydrothermal vent, which discharges enormous amounts of reductive energy in the form of reduced sulfur compounds, H2, CH4, and reduced metals during magma degassing and hydrothermal reactions w...

The solar chimney power facility has the potential to become a valuable technology for renewable energy production. Its financial viability depends on a thorough understanding of the processes affecting its performance, particularly because of the large startup costs associated with facility design and construction. This paper describes the potential impacts on plant capacity resulting from clo...

Gas chimneys are one of the most intriguing manifestations focused fluid flows in sedimentary basins. To predict natural and human-induced leakage, it is essential to understand mechanism how flow localizes into conductive chimney dynamics. This work predicts conditions parameters for formation two fields SW Barents Sea, Tornerose field Snøhvit Hammerfest Basin. The based on types models, basin...

The microflora developing during a continuous enrichment culture from a hydrothermal chimney sample was investigated by molecular methods. The culture was performed in a gas-lift bioreactor under anaerobic conditions, at 90°C and pH 6.5, on a complex medium containing sulfur as the terminal electron acceptor. Archaeal and bacterial diversity was studied. Microorganisms affiliated with the gener...

The thermal impedance Zth(jω) has been measured for a transistor fixed on a cooling fin. We have put the setup inside a cilindrical chimney with an inner diameter around cm and various heights H ranging from  to  cm. The enhancement of the natural convection cooling by the chimney is clearly demonstrated by means of Nyquist plots of the thermal impedance. Depending on the insertion distanc...

The solar chimney power plant (SCPP) generates updraft wind through the green house effect. In this paper, the performances of two SCPP styles, that is, the conventional solar chimney power plant (CSCPP) and the sloped solar chimney power plant (SSCPP), are compared through a numerical simulation. A simplified Computational Fluid Dynamics (CFD) model is built to predict the performances of the ...

When its hydrothermal supply ceases, hydrothermal sulfide chimneys become inactive and commonly experience oxidative weathering on the seafloor. However, little is known about the oxidative weathering of inactive sulfide chimneys, nor about associated microbial community structures and their succession during this weathering process. In this work, an inactive sulfide chimney and a young chimney...

Abstract This article discusses the new in Uzbekistan heat recovery technology is leaving flue gas from boilers. achieved by condensation of water vapor therein. An analysis advantages and disadvantages contact surface types. The transfer coefficients condensing exchanger surface. temperature regimes which provide point dew point. limited stresses chimney boiler unit are calculated using utiliz...